Apply a function to a pandas column

apply_function_pd_column.py

# Define a function to get the name field from the first item in a dictionary list
def get_genre1(x):
    x = json.loads(x)
    if len(x) > 0:
        return x[0]['name']

# Now use pandas.apply to use the function on one column
# In thise case create a new column called genres1 to hold the new data
movies['genre1'] = movies['genres'].apply(get_genre1)